Peter Eötvös' Cap-ko (2005), dedicated to Béla Bartók. Bartók's penchant for parallel lines gave Eötvös the idea of using an instrument that makes it possible to play these parallel lines on the piano not with two hands but rather with one. This necessitated that Eötvös rediscover the digital keyboard. For that made possible that a second note sound with every note played, with the interval between the notes alterable at will, as with an organ mixture. Bernd Alois Zimmermann became known in the 1960s as one of the leading composers of the generation that emerged after the Second World War. The violin concerto is a work that displays the characteristics of Zimmermann's composition: It sets its tone forcefully and unmistakably. Martin Smolka works with intervals that he finds in "natural" sounds. His works, in which he uses various forms of microtonality, are performed at all the current festivals for contemporary music -- this one, recorded at 'musica viva' in Munich was premiered in Donaueschingen in 2000.